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. 1999 Dec 8;82(1):234–240. doi: 10.1054/bjoc.1999.0905

Patterns of infection and day care utilization and risk of childhood acute lymphoblastic leukaemia

J P Neglia 1,3, M S Linet 4, X O Shu 5, R K Severson 7, J D Potter 6, A C Mertens 1,3, W Wen 5, J H Kersey 1,2, L L Robison 1,3
PMCID: PMC2363184  PMID: 10638995

Abstract

To investigate if decreased exposure to common childhood infections is associated with risk of childhood acute lymphoblastic leukaemia (ALL) we conducted a case–control study of 1842 newly diagnosed and immunophenotypically defined cases of ALL under age 15, and 1986 matched controls in the US. Data regarding day care, sibship size and common childhood infections were obtained through parental interviews. Data were analysed stratified by leukaemia lineage and separately for ‘common’ childhood ALL (age 2–5 years, CD19, CD10-positive). Neither attendance at day care nor time at day care was associated with risk of ALL overall or ‘common’ ALL. Ear infections during infancy were less common among cases, with odds ratios of 0.86, 0.83, 0.71 and 0.69 for 1, 2–4, 5+ episodes, and continuous infections respectively (trend P = 0.026). No effect of sibship size or birth interval was seen. With one exception (ear infections), these data do not support the hypothesis that a decrease in the occurrence of common childhood infection increases risk of ALL. © 2000 Cancer Research Campaign

Keywords: childhood acute lymphoblastic leukaemia, infections, day care

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Selected References

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